EP3774266B1 - Markierung an spritzgussteilen für energieführungsketten - Google Patents

Markierung an spritzgussteilen für energieführungsketten Download PDF

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Publication number
EP3774266B1
EP3774266B1 EP19717288.5A EP19717288A EP3774266B1 EP 3774266 B1 EP3774266 B1 EP 3774266B1 EP 19717288 A EP19717288 A EP 19717288A EP 3774266 B1 EP3774266 B1 EP 3774266B1
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EP
European Patent Office
Prior art keywords
marking
code
symbol elements
chain link
plastic
Prior art date
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Active
Application number
EP19717288.5A
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German (de)
English (en)
French (fr)
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EP3774266A1 (de
Inventor
Frank Blase
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Igus GmbH
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Igus GmbH
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Publication date
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Publication of EP3774266A1 publication Critical patent/EP3774266A1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L3/00—Supports for pipes, cables or protective tubing, e.g. hangers, holders, clamps, cleats, clips, brackets
    • F16L3/14—Hangers in the form of bands or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/37—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings
    • B29C45/372—Mould cavity walls, i.e. the inner surface forming the mould cavity, e.g. linings provided with means for marking or patterning, e.g. numbering articles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16G—BELTS, CABLES, OR ROPES, PREDOMINANTLY USED FOR DRIVING PURPOSES; CHAINS; FITTINGS PREDOMINANTLY USED THEREFOR
    • F16G13/00—Chains
    • F16G13/12—Hauling- or hoisting-chains so called ornamental chains
    • F16G13/16—Hauling- or hoisting-chains so called ornamental chains with arrangements for holding electric cables, hoses, or the like
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06037—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking multi-dimensional coding
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G06K19/06046—Constructional details
    • G06K19/06121—Constructional details the marking having been punched or cut out, e.g. a barcode machined in a metal work-piece
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/0297—Forms or constructions including a machine-readable marking, e.g. a bar code
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F3/03—Forms or constructions of security seals
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G3/00—Installations of electric cables or lines or protective tubing therefor in or on buildings, equivalent structures or vehicles
    • H02G3/02—Details
    • H02G3/04—Protective tubing or conduits, e.g. cable ladders or cable troughs
    • H02G3/0462—Tubings, i.e. having a closed section
    • H02G3/0475—Tubings, i.e. having a closed section formed by a succession of articulated units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C2037/80—Identifying, e.g. coding, dating, marking, numbering
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/12—Chains
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F3/00—Labels, tag tickets, or similar identification or indication means; Seals; Postage or like stamps
    • G09F3/02—Forms or constructions
    • G09F2003/0208—Indicia
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
    • H02G11/00—Arrangements of electric cables or lines between relatively-movable parts
    • H02G11/006—Arrangements of electric cables or lines between relatively-movable parts using extensible carrier for the cable, e.g. self-coiling spring

Definitions

  • the invention generally relates to the marking of plastic injection molded parts for energy guiding chains.
  • Energy guiding chains are used for the protected and dynamic guiding of lines, such as cables, hoses and the like, between two relatively movable connection points.
  • Energy guiding chains are typically made up of individual chain links, each of which includes one or more plastic injection molded parts.
  • tab-like side parts for a multi-part chain link are known, which are produced as a one-part plastic body by injection molding.
  • the outside and the inside of the plastic component each have a surface whose properties are determined by the selected plastic, but above all by the injection mold used.
  • One-piece chain links produced by injection molding are also known. In the injection molding process, directly usable molded parts of energy guiding chains can be produced inexpensively in large series or mass production.
  • the invention relates in detail to such a generic plastic injection molded part of a power transmission chain, e.g. a side part of a chain link, the injection molded part being produced as a one-piece plastic body using the injection molding process, which has a first side, in particular the outside of the side part, with a first surface and a second side , in particular the inside of the side part. At least one marking is introduced into the plastic body by injection molding and is provided so that it is visible on the first side.
  • Negative form markings are introduced, such as protruding or recessed inscriptions on the surface, for example with the item number and manufacturer. It is also known to introduce variable markings during injection molding, for example the date of manufacture. This is typically done using a number of so-called “moulding clocks", ie stamps that can be rotated in the injection molding tool and introduce a type of time stamp into the plastic body, which is usually visible on the outside.
  • markings can be found on many injection molded parts for energy chains from the applicant (igus GmbH) that are available as catalog products.
  • a marking here means in particular optically readable information, regardless of whether it is human and/or machine readable.
  • DE 11 2004 000 584 T5 a chain link of a power transmission chain is known, on the side parts of which two time stamps are conventionally attached using injection molding technology to indicate the month and year of manufacture (cf. there FIG.2 ).
  • DE 10 2008 046700 A1 describes a chain link of a power transmission chain with injection-molded anchorage devices, which have inscriptions for identifying the type of anchorage device.
  • So-called 2D codes in particular matrix codes
  • QR-Code ® in particular according to ISO/IEC 18004
  • DataMatrix TM code in particular according to ISO/IEC 16022
  • QR-Code ® in particular according to ISO/IEC 18004
  • DataMatrix TM code in particular according to ISO/IEC 16022
  • QR-Code ® in particular according to ISO/IEC 18004
  • DataMatrix TM code in particular according to ISO/IEC 16022
  • Two-dimensional codes are used for part identification in manufacturing, e.g. in process automation, for traceability, quality control, etc. Reliable, fast and precise identification is also beneficial after manufacturing, especially for the user.
  • DPM direct part identification or direct marking of parts
  • 2D codes two-dimensional codes
  • Needle embossers, scratch embossers, needle-scratch engraving systems and similar engraving machines are also known for introducing a marking directly into the part surface. These are mainly used for metal parts. As with laser engraving, these are intrusive or subtractive methods that subsequently change the surface of the component in a controlled manner, e.g. to introduce the desired data code marking with the 2D code.
  • Non-intrusive techniques are also known, in particular additive marking methods, which mark by subsequently applying a layer of media to the surface, e.g. inkjet marking, see details in Technical Report ISO/IEC TR 24720 (first edition 2008).
  • WO 02/09018 A1 was suggested one to use a special insert in the mold production of the ceramic casting mold, which creates a negative mold of a desired matrix code, eg a DataMatrix TM code in the hollow mould, eg for a rotor blade of a turbine.
  • the special insert is integrated into the model (positive mold), which is used to produce the hollow mold (negative mold) for subsequent primary molding from the liquid state.
  • the insert and the model are made of waxy fusible material. Both are removed from the mold by heating, leaving a negative of the desired 2D code in the mold.
  • the patent describes another approach to marking metal castings during the primary forming process (primary forming from the liquid state).
  • DE 10 2008 024 906 B3 This is intended to enable tamper-proof marking of cast parts during the primary forming process.
  • a stamp that can be adjusted with respect to the coding is provided, which produces variably adjustable negative forms of the matrix code elements on the wall of the mold facing the metal melt, which the casting process fills with melt to form a 2D code.
  • the code can be reset from one part to the next.
  • Such a mold is complex, expensive and maintenance-intensive or prone to errors.
  • EP 3 305 498 A1 describes automotive parts made of plastic, such as housings for various components or parts of the vehicle trim, which are marked with a multi-dimensional code such as a data matrix code or a QR code.
  • the code allows component identification in the process, eg to check the correct installation of the desired component.
  • the code will be after EP 3 305 498 A1 produced by primary shaping of the code structure together with the component, e.g. by injection molding, blow molding or 3D printing.
  • marking injection molded parts with additional information is also desirable in the course of the production of energy guiding chains made of engineering plastics.
  • the technology should be error-proof and as reliable as possible, even with very large quantities.
  • a chain link of an energy transmission chain comprising at least one plastic injection molded part according to claim 1.
  • a chain link of an energy transmission chain comprising at least one plastic injection molded part
  • a side part of a chain link which is produced as a one-piece plastic body in an injection molding process from a plastic with a uniform color throughout.
  • the plastic body has a first side, e.g. an outer side of the side part, with a first surface and a second side, e.g. an opposite inner side of the side part.
  • at least one marking can already be introduced into the plastic body in the course of production using the injection molding process, so that the marking is visible on the first side.
  • the marking comprises a data code marking with a 2D code, namely a QR code, which is already introduced into the plastic body during production using the injection molding process and is provided on the first side in a machine-readable manner.
  • the 2D code is used for data coding or encodes data and is suitable for the acquisition of this data by a data acquisition device.
  • the detection can be optical, in particular electro-optical, with a commercially available data acquisition device or code reader.
  • the data code marking is thus produced together with the actual injection molded body in the course of its production from a visually black plastic in the injection molding process or in a correspondingly designed mold or injection molding tool. Due to the fixed assignment in the mold, mix-ups are impossible.
  • the data code marking becomes or is an integral part of the injection-molded body and thus cannot be separated from it, at least not in a non-destructive manner.
  • a matrix code in an already widespread or standardized format for example a QR code according to ISO/IEC 18004, is used as the 2D code in the data code marking. QR code, SQRC, iQR code or design QR code etc. understood.
  • DataMatrix TM code according to ISO/IEC 16022 or a so-called GS1 DataMatrix is also widespread.
  • Other well-known 2D codes are also possible, for example an EZ-Code ® .
  • Code is understood here as the mapping of data into an optically recognizable symbol.
  • Such codes use a spatial two-dimensional arrangement of two optically different types of flat elements, code fields or so-called symbol modules (hereafter symbol elements) for coding, which together make up the actual data code symbol.
  • symbol elements symbol modules
  • the two different element types are referred to below as first symbol elements and as second symbol elements.
  • a symbol element is a flat area which, together with other symbol elements, represents a 2D code symbol due to its optical effect and/or shape.
  • Symbol elements of the first type have a largely similar visual effect and/or shape or have the same visual effect as one another. The same applies to the second symbol elements. However, the first symbol elements differ significantly in their optical effect and/or shape from the second symbol elements.
  • printed matrix codes These are typically square cells of the same size as symbol modules in two different contrasting colors that can be easily distinguished visually, mostly black and white.
  • the first symbol elements and the second symbol elements are integral components of the plastic body, i.e. are formed by it without, for example, application or printing being necessary.
  • the first symbol elements have a different (actual) surface finish than the second symbol elements. Due to the different surface properties of the symbol elements, an optical contrast can be recognized in the sense of different light reflections, in particular even without different coloring of the materials which represent the symbol elements.
  • one and the same plastic is preferably used for the energy guiding chain component and the data code marking. A different coloring of the symbol elements is not intended.
  • the first symbol elements have the same surface finish as a first surface of the injection-molded part, at least over a predominant surface area of the first surface.
  • the second symbol elements can in particular have a different surface profile or different profile properties relating to the actual surface condition.
  • surface profile means the actual surface profile in cross section along at least one of the main directions, preferably along both directions.
  • the profile preferably has identical or optically equivalent properties throughout the surface of all second symbol elements.
  • the surface or profile property can be disordered, uneven and/or chaotic.
  • the first and second symbol elements can differ in particular with regard to their roughness parameters (DIN EN ISO 4287) differentiate
  • the first symbol elements have a smoother surface, i.e. have a lower absolute roughness depth than the second symbol elements. All of the first symbol elements have a surface finish that is identical to one another in the technical sense, but a surface finish that is demonstrably different from all the second symbol elements. The surface roughness can be measured using technical methods known per se on the surface of the symbol elements.
  • the first symbol elements have an arithmetic mean roughness value Ra in the range from 0.5 ⁇ m to 3.5 ⁇ m (microns), preferably in the range from 0.75 ⁇ m to 2.75 ⁇ m
  • the second symbol elements have an arithmetic mean roughness value Ra in the range from 5 ⁇ m to 12 ⁇ m, preferably in the range from 6.50 ⁇ m to 10.50 ⁇ m.
  • the measurement of the arithmetic mean roughness value Ra can be carried out in particular according to the standard DIN EN ISO 4288 (1997 version) using the profile method, with Ra as the standardized parameter according to DIN EN ISO 4287 (1998 version).
  • the first symbol elements are or lie flush or level with the first surface in comparison to a region of the first surface adjoining the data code marking.
  • the first symbol elements can smoothly transition into the surrounding surface of the injection molded part. This arrangement simplifies mold construction since special processing may only be required for the second symbol elements.
  • a particularly simple initial production or subsequent adaptation of a suitable or existing injection molding tool is made possible if the second symbol elements are formed by areas which protrude or are raised in relation to the surface of the first side of the injection molded part.
  • this has the advantage of not changing the (macroscopic) geometry of the injection molded part. It is advantageous if the marking does not weaken the wall thickness caused because chain links, in particular side plates of energy chains, are sometimes exposed to very high forces during operation.
  • the average height difference between the surfaces of the first and second symbol elements is less than or equal to 0.5 mm. This means that even symbol elements with a relatively small, e.g. On the one hand, the component geometry is not noticeably changed.
  • the data code marking can in particular be produced together with a structural area of the injection molded part, i.e. without an additional, separate part area for the marking or corresponding material expenditure.
  • the data code marking may be provided in a region of the first side of the injection-molded body that is recessed in relation to the first surface. This protects the marking against abrasion, for example on projecting edges or the like. It is also possible, additionally or alternatively, to form the second symbol elements by areas that are recessed or recessed compared to the surface of the first side of the injection-molded part. Irrespective of this, the data code marking should be provided in a surface area of the plastic body that is easily visible but not or not very susceptible to wear.
  • a preferred embodiment provides that the second symbol elements cause or produce greater light scattering or more pronounced diffuse reflection through their surface than the first symbol elements with identical incident light. Through different light scattering, a difference in brightness can be made optically or visually perceptible without changing the material properties.
  • the symbol elements are preferably not discolored, but only cause optical contrast due to different light scattering.
  • the optical contrast or the optical differentiability of the different symbol elements is thus preferably caused by different optical scattering properties.
  • the second symbol elements have a predetermined, significantly stronger optical scattering effect with regard to the incident light due to the predetermined different surface texture, for example due to corresponding roughening in the injection mold.
  • the stronger light scattering of the second symbol elements in comparison to the first symbol elements can be determined, for example, via the scattering coefficient or the scattering cross section using optical methods known per se and, if necessary, optimized.
  • the light scattering by the second symbol elements should come as close as possible to ideal diffuse reflection (Lambert radiator).
  • the second symbol elements can have a high degree of roughness relative to the wavelength range of visible light, particularly on their surfaces.
  • the first and second symbol elements can have different degrees of light reflectance based on the same measurement arrangement, which differ by at least 20%, for example.
  • the first symbol elements can have a smooth, partly reflective surface.
  • the second symbol elements also produce an optically essentially isotropic light scattering.
  • a spherical coordinate system with polar axis or Z-axis parallel to the surface normal on the base of the 2D codes as equatorial plane (e.g. flush with the surface of the first symbol elements)
  • essentially isotropic light scattering here means that the quantity of light scattering in a selected direction at constant azimuth angle essentially does not depend on the polar angle. This can usually be checked visually, for example if the viewer does not notice any significant change in brightness on the second symbol elements when the component is rotated around the Z axis and the light irradiation remains the same.
  • Such an essentially isotropic light scattering can be achieved, for example, by aperiodic, e.g. technically chaotic, surface profiles, which are adjusted in such a way that the quantitative deviation over the entire polar angle range (from 0 to 2n) is smaller than a predetermined threshold, e.g. over the entire polar angle range shows a deviation of no more than 15%.
  • aperiodic, e.g. technically chaotic, surface profiles which are adjusted in such a way that the quantitative deviation over the entire polar angle range (from 0 to 2n) is smaller than a predetermined threshold, e.g. over the entire polar angle range shows a deviation of no more than 15%.
  • An approximately equal (isotropic) light scattering in all directions can be achieved in particular if the roughness or the deviation from an ideally smooth surface on the second symbol elements is largely independent or random from both surface directions.
  • Anisotropic light scattering e.g. by means of diffraction gratings or similar periodic structures, e.g. regular hatching of the surface, would also be conceivable.
  • an advantage of isotropic light scattering is that the relative orientation of the data code marking to the optics of the data acquisition device is therefore irrelevant with regard to the polar angle. This is particularly advantageous for energy chains, because they do not have a specified orientation in the end application. Cable drag chains are used in a wide variety of spatial orientations and in most applications form two strands rotated by 180° to each other.
  • the inventive generation of the data code marking with the 2D code during injection molding or in the injection mold makes it possible in particular for the 2D code, including the visible surfaces of the first and second symbol elements, to be produced in one piece from the same plastic as the actual plastic body itself.
  • conventional polymers or plastic mixtures for example with a predominant proportion by weight of polyamide, optionally with reinforcing fibers, can be used.
  • the data code marking is possible, in particular, if the color of the plastic remains the same throughout, even with a visually black plastic, ie even without materially different coloring of the two basic types of symbol elements in the 2D code.
  • the data code marking according to the invention is particularly advantageous in combination with injection molded parts made of fiber-reinforced, injection-moldable plastic.
  • the proposed solution makes it possible in particular to produce the data code marking with the 2D code off-the-tool with the plastic body, so that it is already machine-readable without any post-processing.
  • the data code marking can consequently be produced in particular as a direct marking together with the injection molded part in the same injection mold. This allows a particularly cost-effective marking with a 2D code or a matrix code.
  • Tests show that an optically easily detectable different surface finish of the first symbol elements compared to the second symbol elements can be achieved if, on the one hand, the first symbol elements have a surface finish that achieves spark erosion of the mold by electroerosive machining or spark erosion removal (DIN 8580). leaves.
  • a suitable surface finish of the second symbol elements can be achieved if their surface finish corresponds to a laser engraving, in particular a deep laser engraving or 3D laser engraving of the injection mold (mold).
  • the first surface of the first side of the injection-molded part outside of the data code marking can also correspond to spark erosion.
  • the first side can, as intended, be an outside of the injection-molded part.
  • the second side of the molded part may have a second surface that is at least substantially the same
  • the surface finish is like the first page, ie it also has a surface quality produced by spark erosion (EDM: electrical discharge machining).
  • Relatively small roughness depths of the first surface and optionally of the first symbol elements can be achieved by spark erosion, i.e. desirably smooth surfaces.
  • a further advantage is that a different method is required in the tool production of the molding tool, e.g. laser processing of the injection molding tool, only for the optical contrast of the second symbol elements.
  • the data code marking is preferably a permanent marking that remains the same across all identical injection molded parts, i.e. it is created in an unchangeable manner in the injection molding tool.
  • the data encoded by the 2D code can in particular include a manufacturer-related URL identifier or a PURL identifier.
  • the user for example the maintenance staff, can be guided from the energy supply chain to a correspondingly predetermined website of the manufacturer in the simplest possible way using a commercially available smartphone with software for scanning in the 2D code, for example a QR code reader become.
  • the data encoded by the 2D code include encrypted and/or injection-molded part-specific data content.
  • An SQRC code secure QR code
  • the injection-molded part can also have a conventional user-readable marking, in particular a time marking, which makes it possible to determine the time of manufacture. This can also be introduced into the plastic body during injection molding, e.g. using a time-variable casting timer marking stamp.
  • a conventional, user-readable markings are also preferably provided on the first side of the injection molded part, on which the data code marking is also provided.
  • the invention is based on the production of multi-part or one-part chain links of a power transmission chain and its Attachments applicable (e.g. dividers, transverse shelves, end fittings, strain relief, etc.).
  • the data code marking according to the invention with a 2D code can thus be provided, for example, both on one or both side parts of a chain link (link plates) and on at least one opening web connecting the side parts.
  • each individual injection molded part can have its own permanently assigned 2D code in the corresponding data code marking.
  • each individual part of the cable carrier is easily identifiable for the user.
  • a wide variety of individual parts are already possible for energy chains of a specific product series, depending on, among other things, the deflection radius, chain width, chain height, etc., which are sometimes difficult for users to distinguish.
  • the injection mold for the production of injection-molded plastic parts for power transmission chains can be made of steel in particular.
  • the injection mold has a predetermined marking area that is fixed in the injection mold for a 2D code that is formed or incorporated in the shaping wall to delimit the injection molding cavity.
  • the marking area has a number of first symbol areas, which are produced in particular by spark erosion, e.g. together with the production of the boundary wall for the first surface of the injection molded part.
  • the marking area in the mold has a number of second symbol areas that have a different surface finish, in particular a greater roughness depth, than the first symbol areas.
  • the second symbol areas can be produced or provided in particular in the course of the initial production or also subsequently, in particular by laser engraving of the injection molding tool.
  • a deep laser engraving or 3D laser engraving of the injection mold or the mold is particularly suitable as a laser engraving.
  • the first symbol areas are therefore used to generate the first symbol elements and the second symbol areas are used to generate the second symbol elements.
  • Under injection mold is in particular understood as a mold half (half shell) of a two-part mold, since it is sufficient if the data code marking is present on one side.
  • An energy chain injection molded part with a 2D code can offer various additional benefits.
  • the assembly and/or maintenance can be simplified or supported, e.g. by calling up information on the construction, assembly and/or maintenance of the energy guiding chain.
  • the user By capturing the data of the 2D code with a smartphone, tablet or the like directly on the plastic injection molded part, the user can be taken to a manufacturer website, e.g. assigned to the product series for this plastic injection molded part, e.g. via a URL created in the QR code.
  • the website may contain product information, such as assembly or maintenance instructions, specification data of the individual parts and/or drag chain, etc.
  • an ordering function can be provided for ordering spare parts.
  • each individual part of a specific energy guiding chain series can be provided with a uniquely assigned 2D code of its own in order to offer such additional benefits.
  • additional web-based queries e.g. regarding at least one parameter of the plastic injection molded part, can be sent to the user in order to provide targeted information. It is also conceivable to call up an application on the end device that provides additional benefits for the product.
  • the data code marking can also be used to identify counterfeit products, for example using encrypted additional data.
  • the user can be guided to a manufacturer's website assigned to the plastic injection molded part by data acquisition of the 2D code on the plastic injection molded part. In this way, additional queries in particular with regard to at least one identifying feature of the plastic injection molded part, addressed to the user, for example in order to provide a statement about the authenticity or a forgery.
  • FIG.1 and FIG.4 show a section of a known energy guiding chain made of individual chain links 1, for example the product series with the trade name E4.1L from igus GmbH (D-51147 Cologne), which is particularly lightweight and yet very robust.
  • three chain links 1 are shown, here a middle one with two so-called outer plates 2A, 2B as side plates and two more with so-called inner plates 3A, 3B.
  • the outer flaps 2A, 2B overlap the inner flaps 3A, 3B and two side flaps 2A, 2B; 3A, 3B are connected to one another to form chain links 1 via detachable transverse webs 4 (opening webs).
  • the side flaps 2A, 2B; 3A, 3B form strap strands that continue over the entire length of the energy guiding chain.
  • the energy guiding chain FIG.1 or. FIG.4 is in WO 2014/161761 A1 described in more detail.
  • the side flaps 2A, 2B; 3A, 3B and crossbars 4 are plastic parts made from a technically hard and tough plastic, e.g. polyamide with reinforcing fibers, and produced using injection molding technology.
  • the injection molded parts 2A, 2B; 3A, 3B; 4 are made in particular from a largely opaque, as opaque as possible, in particular black or very dark-colored plastic.
  • the side flaps 2A, 2B; 3A, 3B and transverse webs 4 each have an inner side 5 and an opposite outer side 6 relative to the accommodation space for cables in the chain link 1, and overall have a relatively flat, e.g. plate-like design.
  • FIG.2A-2B show an outer plate 2A of a chain link 1 purely by way of example to illustrate the invention FIG.1 , whereby any type of side plates or also one-piece chain links can be considered.
  • a data code marking 10 with a flat two-dimensional matrix code here a QR code according to ISO/IEC 18004 with, for example, a square code symbol with 21x21 up to 177x177 individual ones, depending on the version Fields for symbol modules or symbol elements provided.
  • the data code marking 10 is clearly visible during operation and has a size of, for example, at least 15 ⁇ 15 mm in order to be machine-readable for a data recording device, for example a smartphone, even from a certain distance.
  • the coding of a QR code according to ISO/IEC 18004 as a data code marking 10 is known per se and is not explained in more detail here. The additional benefit can be obtained by scanning the QR code 10 FIG.2A be tested.
  • FIG.3 shows a section in one direction along the line III-III as a schematic diagram FIG.2A , limited here to the in FIG.2A position marker shown on the top left.
  • the individual symbol elements namely first symbol elements 11 and second symbol elements 12 each have a different surface finish.
  • the second symbol elements 12 in particular have a rougher cross-sectional profile, i.e. a greater roughness depth than the first symbol elements 12.
  • the more pronounced roughness depth of the second symbol elements 12 can be measured in particular using the arithmetic mean roughness value Ra, which should be noticeably greater for the second symbol elements 12 than for the first symbol elements 11, for example by a factor of at least 2 times, preferably >3.
  • the first symbol elements 11, which have a smoother surface, can have the same surface finish as the remaining or predominant first surface 13 on the outside 6 of the injection-molded part 2A.
  • the surface or cross-sectional profile of both types of symbol elements 11 or 12 extends in both surface directions x, y of the plane FIG.2B similar and in FIG.3 shown only schematically and representatively.
  • the greater roughness of the second symbol elements 12 is set in such a way that they cause significantly greater light scattering than the first symbol elements 11.
  • the surface profile of the second symbol elements 12 is aperiodic in both surface directions x, y of the main plane of the injection molded part 2A in order to achieve largely isotropic light scattering cause.
  • FIG.4 FIG. 1 shows a transverse web or opening web 4 in the geometry according to FIG.1 .
  • each component can be individually assigned an associated unique code in each size, which is encoded in the 2D code of the data code marking 10 or 20 and is transmitted, for example, via the recognized URL as a query parameter to a manufacturer's website.
  • FIG.5 12 shows a photo of a steel mold half 30 of a plastic injection mold for producing an outer link 2A, 2B FIG.1-2 .
  • the mold half 30 of the injection mold after FIG.5 is for off-tool generation of the data code marking 10 together with the injection molded part 2A, 2B (cf. FIG.1 ) directly incorporated in the injection molding process a marking area 33 and unchangeable.
  • the marking area 33 corresponds to the negative form of the desired 2D code, eg a QR code, according to the data code marking 10 FIG.2A-2B . Accordingly, the marking area 33 has first, in some cases, square and field-like symbol areas 31.
  • the symbol areas 31 can be designed flush with the surface and without any difference in the surface finish to the rest of the smooth boundary wall of the mold half 30, in particular by spark erosion (EDM: electrical discharge machining).
  • the marking area 33 also has second symbol areas 32 , some of which are square and field-like, which are recessed compared to the symbol areas 31 .
  • the second symbol areas 32 can be introduced later by deep laser engraving or 3D laser engraving of the mold half 30 or injection mold.
  • the laser engraving for producing the second symbol areas 32 allows sharp-edged transitions and parameter settings for generating the desired aperiodic isotropically scattering surface profile of the second symbol elements 12 (cf. FIG.3 ).
  • a data code marking 10 or 20 ( FIG.2A-2B , FIG.4 ) of the same material as the plastic body of the injection molded part 2A, 2B; 3A, 3B or 4 and can be produced off-the-tool. Post-processing is not necessary for machine-readable recognition of the code of the data code marking 10 or 20.
  • FIG.6A-6B show another mold half 40 made of steel Production of an opening bar 4 after FIG.4 .
  • FIG.6A-6B also illustrate by way of example the measurement of the roughness depth, here the arithmetic mean roughness value Ra in the profile method according to DIN EN ISO 4288 (1997 version) on symbol areas 41, 42 produced accordingly by electroerosion or laser engraving.
  • the first symbol areas have the same properties as the other predominant surface 13 of the Injection molded part 4. It should be noted that approximately the same roughness depth can be formed on the surface 13 of the plastic injection molded part in the injection molding process, i.e.
  • optical light scattering properties of the surfaces (actual surface profiles) generated by the symbol regions 32 or 42 on the second symbol elements 12 can thus be empirically optimized.
  • FIG.6C illustrates the arithmetic mean roughness value Ra as a parameter according to DIN EN ISO 4287 (1998) as a roughness parameter.
  • Ra is the arithmetic mean of the amounts of all profile values.
  • the profiles can also be measured by determining other parameters, such as the average peak-to-valley height Rz, using an electrical profiler.
  • Z(x) illustrates a real surface profile purely schematically, it is not a measurement result. Very smooth surfaces can be achieved as boundary walls of the mold halves 30, 40 by spark sink erosion, so that pronounced peaks and grooves in the surface profile of the injection mold and thus of the injection molded part are avoided, and Ra is significant.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Security & Cryptography (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Details Of Indoor Wiring (AREA)
  • Electric Cable Arrangement Between Relatively Moving Parts (AREA)
EP19717288.5A 2018-04-12 2019-04-09 Markierung an spritzgussteilen für energieführungsketten Active EP3774266B1 (de)

Applications Claiming Priority (2)

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DE202018102000.5U DE202018102000U1 (de) 2018-04-12 2018-04-12 Markierung an Spritzgussteilen für Energieführungsketten
PCT/EP2019/058926 WO2019197392A1 (de) 2018-04-12 2019-04-09 Markierung an spritzgussteilen für energieführungsketten

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EP (1) EP3774266B1 (ja)
JP (1) JP7368375B2 (ja)
KR (1) KR20200140369A (ja)
CN (1) CN112384349B (ja)
DE (1) DE202018102000U1 (ja)
DK (1) DK3774266T3 (ja)
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US20210033219A1 (en) 2021-02-04
CN112384349B (zh) 2023-07-28
CN112384349A (zh) 2021-02-19
DE202018102000U1 (de) 2019-06-27
US11988312B2 (en) 2024-05-21
SG11202010048PA (en) 2020-11-27
DK3774266T3 (da) 2023-05-08
JP7368375B2 (ja) 2023-10-24
KR20200140369A (ko) 2020-12-15
EP3774266A1 (de) 2021-02-17
WO2019197392A1 (de) 2019-10-17
JP2021521025A (ja) 2021-08-26

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